I have had my 2021 M3 LR + acceleration boost for a little over a month now and have been loving it. It went in for service to install homelink and for some minor panel/door alignment issues and some rattles. I am fortunate that my service center still does loaners and was surprised that they are loaning Model S P90Ds - a car which while 6 years old retailed for well over $100K. I was initially excited seeing the P90D badge think how I would get to experience what sub 3s 0-60 is like. When I drove it I discovered (as many probably already know) that it's locked in Chill mode. I can understand some of the reasoning for doing this but man what a waste of a P90D. It accelerates slower than my wife's Subaru! This essentially took away probably the only thing I would have liked about that car. I prefer almost all other aspects of my M3. The loaner was somewhat dirty and worn inside but putting that aside I didn't find it to be all that luxurious for that price car. I much prefer the minimalistic and modern design of the M3 - it's just a very pleasant and relaxing environment I have found. I found the seats less comfortable and the lack of any center console was a little weird. I'm sure the new S refresh is nice inside though from pics and video reviews. There was a Plaid on the lot waiting for pickup that I took a peak at too - very nice. Aside from being locked in Chill mode the handling felt like a big sedan. The M3 is much more nimble and enjoyable to drive. It was truly refreshing getting back in my car yesterday. In the end it was probably a good thing I was locked in Chill mode. If I got used to the true power of the P90D I'm sure that would have detracted from how I feel about my car. That being said I went so far as to look up the top (statistically) few hundred 4 digit codes and try them all to unlock speed limit mode but no luck. Oh well.